Airborne Doppler radar observations of the stationary rainband complex and secondary eyewall in Hurricane Rita (2005) were analyzed to better understand the inner-core dynamics of tropical cyclones. In the upwind end of ...

The leading modes of variability of the extratropical circulation in both hemispheres are characterized zonally symmetric or "annular" structures. Whereas the structure and dynamics of the Southern Hemisphere (SH) annular ...

The relationship between climate modes and Antarctic sea ice is explored by separating the variability into intraseasonal, interannual, and decadal time scales. Cross spectral analysis shows that geopotential height and ...

A well documented shallow foehn and gap flow case in the Wipp valley in Austrian Alps from 20 Oct 1999 provided an excellent opportunity to examine the applicability of the Reduced Gravity Shallow Water (RGSW) model to ...

A lightning data assimilation technique is developed for use with observations from the World Wide Lightning Location Network (WWLLN). The technique nudges the water vapor mixing ratio toward saturation within 10 km of a ...

We examine the efficacy of a novel ensemble data assimilation (DA) technique in climate field reconstructions (CFR) of surface temperature. We perform four pseudoproxy experiments with both general circulation model (GCM) ...

Atmospheric classifications are created for two regions using an automated clustering technique first described in Marchand et al. 2009. This method applies an iterative clustering algorithm to regional snapshots of dynamic ...

How does rain change with global warming? This dissertation investigates the rate of global-mean precipitation increase, changes in atmospheric radiative cooling, and the changes in frequency and intensity of rain events. ...

The 1987 Australian monsoon was observed with satellites, rawinsondes, radar and aircraft. These data are presented, with theory filling the gaps, in illustration of its dynamics.The engine of the monsoon is its embedded ...

Mercury (Hg) is a ubiquitous trace metal in the environment originating from both natural and anthropogenic sources. It is a pollutant of concern because of the adverse human health effects caused by the consumption of ...

This thesis focuses on aerosol properties measured in Southwestern Portugal during the second Aerosol Characterization Experiment. Fundamental aerosol physical properties such as particle size distribution and hygroscopic ...

Simulations of tropical-tropopause-layer (TTL) cirrus under the influence of a large-scale equatorial Kelvin wave have been performed in two dimensions. These simulations show that, even under the influence of the large-scale ...

The climatic effect and requirements of clouds over the Arctic Ocean are examined using a pair of one-dimensional models. A coupled ice-atmosphere column model with prescribed cloud properties is used to examine the effect ...

This dissertation addresses several aspects of synoptic-scale incursions of cold air (cold surges) propagating equatorward along the east side of the Andes cordillera in South America. Similar cold surges are also a well ...

Successfully forecasting when and where individual convective storms will form remains an elusive goal for short-term numerical weather prediction. In this dissertation, the convective initiation (CI) challenge is considered ...

In an effort to improve the analysis and subsequent short-term forecast of mesoscale phenomena, the assimilation of dense surface pressure observations is examined using an ensemble Kalman filter. Over the Pacific Northwest, ...

Simulations performed by a 3D cloud-resolving model are used to study the transport of tropospheric tracers into the lowermost stratosphere via midlatitude convection. Direct transport by convection is believed to be the ...

Middle-tropospheric vertical velocity(o500) is used to isolate the effect of large-scale dynamics on the observed radiation budget and cloud properties in the Tropics. The ratio of shortwave to longwave cloud forcing ...

This study investigates the spatial and temporal variability of surface air temperature (SAT) in the instrumental record of climate, emphasizing the detection of SAT change in the presence of natural variability as well ...